Improvement in propulsion of vessels



UNITEE STATES KEYES P. COOL, OF GLENS FALLS, NEW YORK.

IMPROVEMENT IN PROPULSION OF VESSELS.

Specication forming part of Letters Patent No. 117,051, dated July 18,|871.

To all whom it may concern:

Be it known that I, KEYES P. COOL, of Glens Falls, in the county of'Warren and State of' New York, have invented a new and ImprovedFropeller; and I do hereby declare the following to be a full, clear,and exact description ofthe same,

,reference being had to the accompanying drawing making a part of'thisspecilication, in which- Figure l is a plan view. Fig. 2 is a rearelevation, and Fig. 3 is an elevation longitudinal as to the chamber mand transverse as to the iioat l.

This invention relates to a propelling mechanism employing' twocylinders and intended to be placed in a horizontal position on thefloor ofthe after-cabin of a canal-boat or other vessel, and in whichthe piston-rods are directly connected with lloats hung to the rear endsof' said rods, said floats working in bottomless chambers built at thevessels stern and open to the water, so that the moving ofthe iioatssternward propels the boat forward, and the moving of the ioats forwardpropels the boat sternward. The invention consists in the combination ofcertain parts, as

. Specified in the claim.

Referring to the drawing, A is a canal-boat.

c c are two cylinders, placed in a horizontal position lengthwise uponthe boats bottom, one at each side of the keelson and near the stern,said cylinders being supplied with steam in any suitable manner. b b arethe piston-rods, the same extending' out of the cylinders at both en dsof the latter, to their rear extremities horizontal crossbars d beingsecured, which cross-bars stand crosswise of' bottomless chambers m,open at their rear ends and built in the vessels bottom, and at herstern horizontal grooves c being formed lengthwise ofthe sides of' eachchamber my, which grooves the ends of the cross-bars d occupy7 thelatter being guided, as they reciprocate back- A ward and forward, bythe grooves.- Floats lare hung to the cross-bar d, said iioats being ofa length a little less than the width of' the chambers m, and of thesame depth as the chambers The piston-rods b are each provided with tworadial arms, e f, projecting at different angles, one placed in frontofthe blade and the other in rear of' it. Toothed wheels are securedupon the piston-rods in front of' the cylinders, and any suficient meansof' turning the piston-rods by means of' said toothed wheels isprovided. Vhen the boat is to be propelled forward the arms e should beturned into a vertical position in front of the fioats, the arms j' thenstanding clear ofthe floats. The piston-rods moving backward, the floatsare vdriven in a vertical position through the water,

thus driving the boat forward. rlhe piston-rods moving forward, thefloats rise to the surface of the water and offer no resistance. To backthe boat, the pins e should be turned up clear of the iioats, by whichmovement the pins j' are brought down in rear of them. 'llien, when thefloats are drawn forward, the pins f hold them vertical in the water andthe boat is forced backward, and

when the floats are driven backward they rise to the surface and meetwith no resistance. The rods g are those which operate the valves. By

the chambers m the floats are wholly protected.

from accident, and also made to act against a body of' unbroken water,from which they derive the utmost possible resistance. 'lhe water isalso' forced backward in a line with the stern of the boat, and thusprevented from washing against the banks of the canal.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

rI he combination of floats l, rotary piston-rods b, arms ef, andcross-bars d, as described.

KEYES I. COOL.

Vitnesses F. W. RoErNsoN, L. A. ROBINSON.

